Bench-plane



(No Model.)

G. KARRMANN.

BENCH PLANE.

No. 410,710. Patented Sept. 10, 1889.

UNITED STATES PATENT OEEICE.

GEORGE KARRMANN, OF UNIONVILLE, ASSIGNOR TO THE UPSON NUT COMPANY, OFFARMINGTON, CONNECTICUT.

BENCH-PLANE.

SPECIFICATION forming part of Letters Patent No. 410,710, datedSeptember 10, 1889.

Application led May 22, 1889. Serial No. 311,692. (No mdel.)

To all whom, t may concern.-

Be it known that I, GEORGE KARRMANN, a citizen of the United States,residing at Unionville, in the county of Hartford and State ofConnecticut., have invented certain new and useful Improvements in BenchPlanes, of which the following is a speciication.

My invention relates to improvements in bench-planes having a device forthe lateral adjustment of the cutting-bit; and the chief object of myinvention is to provide a friction-slide and operating devices formoving the cutting-bit by frictional contact only.

In the accompanying drawings, Figure 1 is a longitudinal section, partlyin elevation, of a plane which embodies my invention. Fig. 2 is a faceview of the upper portion of the frog, to which my lateral adjustment isapplied. Fig. 3 is a like view of the same provided with differentoperating devices; and Fig. 4 is a transverse section of the same,partly in elevation, on the line o; of Fig. 3. Fig. 1 is on a smallerscale than the figures which follow it.

The plane-stock A, cutting-bit B, holdingcap C and its attachments maybe of any ordinary construction, and therefore require no specialdescription.

I have herein illustrated a lever 5, which is operated by the screw 6,for adjusting the cutting-bit'B longitudinally, in an old and wellknownmanner, and for which any other mechanism for adjusting the cutting-bitlongitudinally may be substituted.

In the upper end of the frog D, immediately under the cutting-bit B, Iplace a frictionslide 7, which is fitted in a proper groove or recess toslide transversely to said frog D and with its upper face slightlyprojecting above the upper face of the frog D. In Figs. 1 and 2 Ioperate this slide to move it transversely to the cutting-bit by meansof the laterallyadjusting lever 8, which is pivoted to the frog, as at9, while its other end is connected with the friction-slide 7 in anysuitable manneras, for instance, by means of the pin 10.

In Figs. 3 and 4 the friction-slide is provided with adownwardly-extending lug 11, having a screw-threaded hole, and mountedin suitable bearings on the under side of the frog is anad'gisting-screw 12, the threaded end of which enters the threaded holein the lug 11. The screw 12 is left free to revolve in its bearings, butheld against longitudinal movement therein by means of `shoulders in theordinary manner of mounting similar screws. I have shown two diiferentdevices for moving the slide to indicate that other operating devicesmay be substituted for the lever 8.

By turning the screw or moving the lever or other operating device theslide 7 may be moved longitudinally in its ways or guides, so as tocarry it transversely tothe length of the cutting-bit. I prefer toroughen the upper surface or a portion of the upper surface of the slide7 te increase its frictional contact with the cutting-bit. In use witheither form the cutting-bit is merely seated in place and clamped in theordinary manner, with its under face at the upper end resting upon thefrictional slide 7 without any connection with said cutting-bit otherthan frictional contact. By moving said frictional slide with anysuitable operating mechanism the upper end of the cutting-bit may bemoved laterally in either direction. By thus moving the bit with africtional slide it is not necessary to make any provision for wear ofthe cutter or to provide any special devices for connecting it"v withthe slide or to pay any attention to the arrangements of the slot. Itmay therefore be used with any ordinary cutting-bit, either slotted ornot slotted.

I claim as my invention-- In a bench-plane, the friction-slide 7,arranged to move transversely under the upper end of the cuttingbit, andprovided with operating mechanism, substantially as described, and forthe purpose speciiied.

GEORGE KARRMANN. IVitnesses:

S. FRISBIE, W. W. WooDFoRD.

